화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.44, No.3, 301-308, May, 2020
DOI10.7317/pk.2020.44.3.301  Export Citation
아연-프탈로시아닌에 의한 탄소나노튜브의 비공유 기능화와 이를 포함하는 폴리불화비닐리덴의 베타상 형성에 대한 연구
Noncovalent Functionalization of Single-walled Carbon Nanotubes Using Alkylated Zinc-phthalocyanine for the β-phase Formation of a Polyvinylidene Fluoride Matrix
손호승, 지재훈1, 정종한, 한성훈, 고중혁1, 박종승†
  • 부산대학교 유기소재시스템공학과
  • 1중앙대학교 전기전자공학부
Hoseung Son, Jae-Hoon Ji1, Jong Han Jeong, Seong-Hoon Han, Jung-Hyuk Koh1, and Jong S. Park†
  • Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, Korea
  • 1School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 06974, Korea
E-mail:
초록
논문에서는 알킬기를 가지는 아연-프탈로시아닌(R-ZnPc)을 이용하여 단일벽 탄소나노튜브(single-walled carbon nanotube, SWCNT)의 분산 특성을 파악하고 이를 포함하는 폴리불화비닐리덴(polyvinylidene fluoride, PVDF)의 베타상(b-phase) 형성에 대한 연구 결과를 제시한다. R-ZnPc는 알킬기를 가지는 프탈로니트릴(phthalonitrile) 중간체를 아연염과 함께 tetramerization 반응을 진행하여 합성하였다. 긴 알킬기가 외부에 존재하기 때문에 R-ZnPc는 다양한 유기 용매에 높은 용해성을 발휘하였다. 또한 알킬기의 소수성 상호작용과 편평한 분자구조의 특징을 이용하여 SWCNT 외벽에 R-ZnPc 분자 wrapping을 유도하여 비공유 결합에 기반한 초분자 복합체(supra-molecular complex)를 제조하였다. Pc-CNT 복합체를 자외-가시광 흡수도, 퓨리에 적외선 분광법, 라만 분광법, 열중량 분석법, 주사전자현미경 측정 및 X선 광전자 분광법 등 다양한 측정 방법으로 분석하였다. 또한 Pc-CNT 복합체를 나노필러로 사용하여 Pc-CNT/PVDF 복합 필름(composite film)을 제조하였다. Pc-CNT/PVDF 복합 필름의 유전 상수는 큰 폭으로 증가하였으며 이는 PVDF의 베타상 형성이 촉진되었기 때문인 것으로 퓨리에 적외선 분광법과 X선 회절분석법 측정을 통해 확인하였다. 본 연구 결과는 R-ZnPc가 SWCNT 표면을 효과적으로 기능화할 수 있으며 제조된 Pc-CNT 복합체가 PVDF 매트릭스의 결정 구조 변화에 영향을 미쳤다는 것을 의미한다. 또한 본 연구에서 제시하는 방법은 하이브리드 복합 필름에 적합한 나노필러를 제조하는데 유용한 방법이 될 것으로 기대된다.
We present the dispersion properties of alkylated zinc-phthalocyanine (R-ZnPc) for single-walled carbon nanotubes (SWCNTs), which finds useful for the β-phase formation of a polyvinylidene fluoride (PVDF) matrix. The R-ZnPc was prepared by direct tetramerization of alkylated phthalonitrile with zinc salts. Due to the presence of long peripheral alkyl-substituents, the prepared R-ZnPc exhibited controllable solubility in selected solvents. Taking advantage of the hydrophobic interactions of alkyl chains and flat structural features of Pc macrocycles, molecular wrapping of R-ZnPc around the SWCNTs was intended to produce noncovalent supramolecular complexes. The prepared Pc-CNT complexes were analyzed by various characterization methods, including UV-Vis, FTIR, Raman, TGA, SEM, and XPS measurements. Furthermore, the Pc-CNT/PVDF composite films were prepared using the Pc-CNT complex as effective nanofillers for the PVDF matrix. The dielectric constants of the Pc-CNT/PVDF composite films were significantly increased as a consequence of the promoted b-phase formation in the PVDF matrix, as evidenced by FTIR and XRD measurements. Current results suggested that the R-ZnPc functionalized SWCNTs have affected the crystalline structure of the PVDF matrix, which can be a useful tool for producing nano-fillers for hybrid polymer composites.
Keywords:polyvinylidene fluoride;zinc-phthalocyanine;single-walled carbon nanotube;carbon nanotube;composite;dielectric constant
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